[TD] Fix error in editable status of DOCUMENT_TYPE

All of the TechDraw ISO7200_Pep templates so that the DOCUMENT_TYPE area is
fully editable, allowing the user to overwrite the default contents entirely
instead of just adding to it.

src/Mod/TechDraw/Templates/A0_Landscape_ISO7200_Pep.svg

@@ -186,7 +186,7 @@
     <text freecad:editable="TITLELINE-1" x="1037" y="809"><tspan>FreeCAD</tspan></text>
     <text freecad:editable="TITLELINE-2" x="1037" y="813"><tspan></tspan></text>
     <text freecad:editable="TITLELINE-3" x="1037" y="817"><tspan></tspan></text>
-    <text freecad:editable="DOCUMENT_TYPE" x="1059" y="822">Mechanical assembly drawing<tspan></tspan></text>
+    <text freecad:editable="DOCUMENT_TYPE" x="1059" y="822"><tspan>Mechanical assembly drawing</tspan></text>
     <text freecad:editable="SHEET" x="1162" y="796"><tspan>99 of 99</tspan></text>
     <text freecad:editable="SCALE" x="1132" y="796"><tspan>M x:x</tspan></text>
     <text freecad:editable="TOLERANCE" x="1132" y="800"><tspan>+/- ?</tspan></text>

src/Mod/TechDraw/Templates/A1_Landscape_ISO7200_Pep.svg

@@ -146,7 +146,7 @@
     <text freecad:editable="TITLELINE-1" x="689" y="562"><tspan>FreeCAD</tspan></text>
     <text freecad:editable="TITLELINE-2" x="689" y="566"><tspan></tspan></text>
     <text freecad:editable="TITLELINE-3" x="689" y="570"><tspan></tspan></text>
-    <text freecad:editable="DOCUMENT_TYPE" x="711" y="575">Mechanical assembly drawing<tspan></tspan></text>
+    <text freecad:editable="DOCUMENT_TYPE" x="711" y="575"><tspan>Mechanical assembly drawing</tspan></text>
     <text freecad:editable="SHEET" x="814" y="549"><tspan>99 of 99</tspan></text>
     <text freecad:editable="SCALE" x="784" y="549"><tspan>M x:x</tspan></text>
     <text freecad:editable="TOLERANCE" x="784" y="553"><tspan>+/- ?</tspan></text>

src/Mod/TechDraw/Templates/A2_Landscape_ISO7200_Pep.svg

@@ -118,7 +118,7 @@
     <text freecad:editable="TITLELINE-1" x="442" y="388"><tspan>FreeCAD</tspan></text>
     <text freecad:editable="TITLELINE-2" x="442" y="392"><tspan></tspan></text>
     <text freecad:editable="TITLELINE-3" x="442" y="396"><tspan></tspan></text>
-    <text freecad:editable="DOCUMENT_TYPE" x="464" y="401">Mechanical assembly drawing<tspan></tspan></text>
+    <text freecad:editable="DOCUMENT_TYPE" x="464" y="401"><tspan>Mechanical assembly drawing</tspan></text>
     <text freecad:editable="SHEET" x="567" y="375"><tspan>99 of 99</tspan></text>
     <text freecad:editable="SCALE" x="537" y="375"><tspan>M x:x</tspan></text>
     <text freecad:editable="TOLERANCE" x="537" y="379"><tspan>+/- ?</tspan></text>

src/Mod/TechDraw/Templates/A4_Landscape_ISO7200_Pep.svg

@@ -196,8 +196,8 @@
        id="text81"
        y="198"
        x="174"
-       freecad:editable="DOCUMENT_TYPE">Mechanical assembly drawing<tspan
-   id="tspan79" />
+       freecad:editable="DOCUMENT_TYPE"><tspan
+   id="tspan79">Mechanical assembly drawing</tspan>
 </text>
     <text
        id="text85"

src/Mod/TechDraw/Templates/A4_Portrait_ISO7200Pep.svg

@@ -41,7 +41,7 @@
     <text freecad:editable="TITLELINE-1" x="65" y="272"><tspan>FreeCAD</tspan></text>
     <text freecad:editable="TITLELINE-2" x="65" y="276"><tspan></tspan></text>
     <text freecad:editable="TITLELINE-3" x="65" y="280"><tspan></tspan></text>
-    <text freecad:editable="DOCUMENT_TYPE" x="87" y="285">Mechanical assembly drawing<tspan></tspan></text>
+    <text freecad:editable="DOCUMENT_TYPE" x="87" y="285"><tspan>Mechanical assembly drawing</tspan></text>
     <text freecad:editable="SHEET" x="190" y="259"><tspan>99 of 99</tspan></text>
     <text freecad:editable="SCALE" x="160" y="259"><tspan>M x:x</tspan></text>
     <text freecad:editable="TOLERANCE" x="160" y="263"><tspan>+/- ?</tspan></text>